Endorsed Major League Baseball Players Association business check, 8.25 x 3, filled out and signed in another hand, endorsed on the reverse by Jackson, “Reginald Jackson,” payable to Reginald Jackson for $193.00, stamp-dated September 1, 1981. Encapsulated in a plastic PSA/DNA authentication holder. In fine condition, with several vertical folds and light bank stamps to reverse, one lightly touching beginning of signature. RRAuction COA.